- Company number
- 12431674
- Incorporated
- 29 Jan 20206 years trading
- Registered office
- Flat 3, 2, Kings Avenue, Poole, BH14 9QF
- Nature of business
- Construction of domestic buildings
SDH Building Ltd is a 6-year-old private limited company registered in Poole, company number 12431674, one of 223 building contractors in Poole. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £9,914 (-100%) on the year before, to £1.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £1 | ||||
| 31 Jan 2025 | £9,915 | £11K | £20K | 1 | |
| 31 Jan 2024 | £4,279 | £3,549 | £30K | 1 | |
| 31 Jan 2023 | £1,021 | £2,763 | £16K | 1 | |
| 31 Jan 2022 | £362 | £19K | £25K | 1 | |
| 31 Jan 2021 | £744 | £6,371 | £17K | 1 |
Where SDH Building Ltd is registered
The registered office is in Poole (BH14), in the Bournemouth, Christchurch and Poole local authority area, South West. Show BH14 9QF on a map.
Other trade companies in BH14
- La Inversion (Construction) LimitedBuilders
- Dalan Automotive LtdMotor traders
- South Pro Cleaning LtdCleaning companies
- Dorset Plumbing & Air Con LtdPlumbers and heating engineers
- Lifestyle Outdoor Living LtdInstallers
- 9295 Developments LimitedProperty developers
- Clear Vision Group LtdCleaning companies
- Chilli Marine LtdMachinery repair and installation
What happens if SDH Building Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 12431674
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 January 2020 (6 years ago)
- Registered office
- Flat 3, 2, Kings Avenue, Poole, BH14 9QF
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 28 January 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Poole
Other active building contractors registered in Poole.
- Sea View Building Services Limited2022
- Silver Arrow Bespoke Limited2013
- Silverbay Capital Ltd2019
- Solent Projects (New Homes) Ltd2018
- SP Property Works Ltd2022
- Stag Home Improvements Ltd2018
- Stansmore (Builders) Limited1947
- Steel Reinforcement Dorset Ltd2023
All building contractors in Poole · All trades in Poole · Builders across the UK
Frequently asked questions
When are SDH Building Ltd's accounts due?
SDH Building Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is SDH Building Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is SDH Building Ltd still trading?
SDH Building Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does SDH Building Ltd do?
SDH Building Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is SDH Building Ltd?
SDH Building Ltd was incorporated on 29 January 2020, 6 years ago.
What is the penalty if SDH Building Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View SDH Building Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.